I don’t know if Scott Manley is niche (1,6 million subscribers), but if you are interestet in everything about space, rockets and sometimes flying, this is the channel for you.
Well yes, but acctually no. The normal unit used in Germany is still PS (Pferdestärke switch is more or less equal to HP), but kW is used more and more. If you want to buy a new car, you see both units, but most of the people still use PS.
Adelbert